<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

</head>
<body>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
    <div id="app">
        <img v-bind:src="imgSrc" alt="">
        <br>
        <img src="imgSrc" alt="" :title="imgTitle+'!!!'" :class="isActive?'active':''" @click="toggleActive">
        <img :src="imgSrc" alt="" :title="imgTitle" :class="{active:isActive}" @click="toggleActive">
</div>
<script>
    var app = new Vue({
  el: '#app',
  data: {
    imgSrc:"",
    imgTitle:"滴滴",
    isActive:flace
  },
  methods:{
    toggleActive:function(){
        this.isActive = !this.isActive;
    }
  }
})
</script>
</body>
</html>